crypto/comp/comp_lib.c

   1 /*
   2  * Copyright 1998-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <openssl/objects.h>
  14 #include <openssl/comp.h>
  15 #include <openssl/err.h>
  16 #include "comp_lcl.h"
  17
  18 COMP_CTX *COMP_CTX_new(COMP_METHOD *meth)
  19 {
  20     COMP_CTX *ret;
  21
  22     if ((ret = OPENSSL_zalloc(sizeof(*ret))) == NULL) {
  23         COMPerr(COMP_F_COMP_CTX_NEW, ERR_R_MALLOC_FAILURE);
  24         return NULL;
  25     }
  26     ret->meth = meth;
  27     if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
  28         OPENSSL_free(ret);
  29         ret = NULL;
  30     }
  31     return ret;
  32 }
  33
  34 const COMP_METHOD *COMP_CTX_get_method(const COMP_CTX *ctx)
  35 {
  36     return ctx->meth;
  37 }
  38
  39 int COMP_get_type(const COMP_METHOD *meth)
  40 {
  41     return meth->type;
  42 }
  43
  44 const char *COMP_get_name(const COMP_METHOD *meth)
  45 {
  46     return meth->name;
  47 }
  48
  49 void COMP_CTX_free(COMP_CTX *ctx)
  50 {
  51     if (ctx == NULL)
  52         return;
  53     if (ctx->meth->finish != NULL)
  54         ctx->meth->finish(ctx);
  55
  56     OPENSSL_free(ctx);
  57 }
  58
  59 int COMP_compress_block(COMP_CTX *ctx, unsigned char *out, int olen,
  60                         unsigned char *in, int ilen)
  61 {
  62     int ret;
  63     if (ctx->meth->compress == NULL) {
  64         return -1;
  65     }
  66     ret = ctx->meth->compress(ctx, out, olen, in, ilen);
  67     if (ret > 0) {
  68         ctx->compress_in += ilen;
  69         ctx->compress_out += ret;
  70     }
  71     return ret;
  72 }
  73
  74 int COMP_expand_block(COMP_CTX *ctx, unsigned char *out, int olen,
  75                       unsigned char *in, int ilen)
  76 {
  77     int ret;
  78
  79     if (ctx->meth->expand == NULL) {
  80         return -1;
  81     }
  82     ret = ctx->meth->expand(ctx, out, olen, in, ilen);
  83     if (ret > 0) {
  84         ctx->expand_in += ilen;
  85         ctx->expand_out += ret;
  86     }
  87     return ret;
  88 }
  89
  90 int COMP_CTX_get_type(const COMP_CTX* comp)
  91 {
  92     return comp->meth ? comp->meth->type : NID_undef;
  93 }